package com.atguigu.lock;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class DeadLockDemo
{
    static Lock lockA = new ReentrantLock();
    static Lock lockB = new ReentrantLock();

    public static void main(String[] args)
    {
        new Thread(() -> {
            lockA.lock();
            try
            {
                System.out.println(Thread.currentThread().getName()+"自己持有A锁，尝试获得B锁");
                try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); }
                lockB.lock();
                try
                {
                    System.out.println(Thread.currentThread().getName()+"成功获得B锁");
                }finally {
                    lockB.unlock();
                }
            }finally {
                lockA.unlock();
            }
        },"A").start();

        new Thread(() -> {
            lockB.lock();
            try
            {
                System.out.println(Thread.currentThread().getName()+"自己持有B锁，尝试获得A锁");
                try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); }
                lockA.lock();
                try
                {
                    System.out.println(Thread.currentThread().getName()+"成功获得A锁");
                }finally {
                    lockA.unlock();
                }
            }finally {
                lockB.unlock();
            }
        },"B").start();

    }
}
